Initial commit

Examples/Example-iOS/TopViewController.swift

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+import UIKit
+import DiffableDataSources
+
+final class TopViewController: UIViewController {
+    enum Section {
+        case main
+    }
+
+    enum Item {
+        case mountains
+        case insertionSort
+    }
+
+    @IBOutlet private var tableView: UITableView!
+
+    private lazy var dataSource = TableViewDiffableDataSource<Section, Item>(tableView: tableView) { tableView, indexPath, item in
+        let cell = tableView.dequeueReusableCell(withIdentifier: UITableViewCell.name, for: indexPath)
+        cell.textLabel?.text = item.title
+        cell.accessoryType = .disclosureIndicator
+        return cell
+    }
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        title = "DiffableDataSources"
+
+        tableView.delegate = self
+        tableView.register(UITableViewCell.self, forCellReuseIdentifier: UITableViewCell.name)
+        tableView.rowHeight = 60
+        tableView.contentInset.top = 30
+
+        reset()
+    }
+
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+
+        if let indexPath = tableView.indexPathForSelectedRow {
+            tableView.deselectRow(at: indexPath, animated: true)
+        }
+    }
+
+    func reset() {
+        let snapshot = DiffableDataSourceSnapshot<Section, Item>()
+        snapshot.appendSections([.main])
+        snapshot.appendItems([.mountains, .insertionSort])
+        dataSource.apply(snapshot)
+    }
+}
+
+extension TopViewController: UITableViewDelegate {
+    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        guard let item = dataSource.itemIdentifier(for: indexPath) else {
+            return
+        }
+
+        let viewController: UIViewController
+
+        switch item {
+        case .mountains:
+            viewController = MountainsViewController()
+
+        case .insertionSort:
+            viewController = InsertionSortViewController()
+        }
+
+        navigationController?.pushViewController(viewController, animated: true)
+    }
+}
+
+private extension TopViewController.Item {
+    var title: String {
+        switch self {
+        case .mountains:
+            return "🗻 Mountains"
+
+        case .insertionSort:
+            return "📱 Insertion Sort"
+        }
+    }
+}